Shuttle changing loom



Alg- 23, 1932 R. G. TURNER ET AL 1,873,073

SHUTTLE CHANGING LOOM Filed Dec. 26. 1931 2 sheets-sheet 1 Illlllllllw@umuui f' Aug. 23, 1932. R. G. TURNER ET AL SHUTTLE CIMN'GING LOOMFilred Dec. 26, 1931 2 Sheets-Sheet 2 gf; stroke.

Patented Aug. 23, 1932 TES nrCHAnn GBEENLEAETURNER lANDv vICTo'ru H.JENNINGS, 0F WORCESTER, MASSAvwl y CHUSnTTs, AsSrGNons'To CnoMrToN &KNOWLESLOOM WORKS, on, WORCESTERL MAssaCrrnsETTs, A ConronATioN. onMASSACHUSETTS l SHUTTLE CHANGING LOOM Application inea necembeze, 1931.YVserialY No. 583,242. 7i

vThis invention relates to improvements iny shuttle changing looms andit is, the genera-l object of the invention to insuretlie retention oanindication which isV given yby the weft detector mechanism. Y. Y

, n the type 4oi shuttle changer loomito which `this, invention relatesthere is employed a regularly moving actuator to be connected to thechanging device when the .3 running weft is` depleted. VV-hen anelectrical weft detector is employed vibration of the part 'which closesthe circuit may cause interruption of the detectorcircuit. Because oitthis condition exhaustion of weft may be indicated momentarily and thenthe indication lost before the actuator has time to move into engagementwith the changing mechanism, 4 l

It is an important obj ect of our invention to provideia. temporary lockwhich becomes effective when Contact is rst made to hold the actuator inoperating position so that if the lcircuit should become brolrenltheactuator will be held by the lock. In this connec- 25 tion it is stillanother object of our-invention to provide a Seli-clearing^lock` socontrolled as to retain the actuator vin looked position on its workingstroke, but acting to release or unlocksaid actuator' on theVnon-rocking With these and other obj ects in view which will appear asthe description proceeds, our invention resides in the combination andarrangementvof partshereinafter described and 35 set forth in theclaims. fk

In the accompanying drawings,` wherein a convenient embodiment of `ourinventionis set forth, Y i

Fig. 1 is aside elevation of the lower part 4c of the loom provided withour invention, y

Fig. 2 is atop plan view ofthe structure shown 'in Fig. 1, `parts 'beingomitted,

Fig. 3 isV a. front. elevation of the latch on the actuator, showingsaid latch in non-oper- 45 ating4 position, p 7 Fig. 4 is a view similarto Fig. 3 but'showing the latch locked preparatory to thechangingoperation of the loom, e Fig. 5 is a jdetail plan view taken in the 50direction of arrow 5, Fig. 4, and` FigQGis a fragmentary detail Viewsimilar to a part ofFig. 4, showing theparts in fa different position. gI '.ff ,Referring to the drawings, we'liave shown a looinframe and abottom shafty 11 lhaving mounted thereon a ,track cam 12.V The lattercoacts with.y roller 13 -mounted on anfactuator lever'14'pivoted aboutal'lX'ed stud 15.` The Cam has a completerevolutionpreferably everysecond piclr'of the loom andacts Ato raisethe forwardend 16of lthe lever'14-at that pointin the cycle ofthe lloomoperation when` shuttlechanging is aboutto begin, or whenfthe lay Lis substantially at frontcenter. Pivoted onzthe stud is aseco'nd lever^20 the forward endl lofwhich, carries a stud 21 yieldingly -held between link members 22 and 23pivoted togethen as 'at 24. A tension spring y.25 .holds Said memberstogether in 'a manner similarto the connections employed on certaintypes of dro-p box motions. -The lower end of flink 22 is connected yas`at26 to a block 27v which isoperatively connectedto v the bottomv of abox lifter rod The dat# ter has a nut 29 adjustable thereon to Yengage asurfaceof the rocker, iron ,30, whichl moves about axis 31 of the lay. fg When thelever is raised alittingiiorce isftransmitted through thevstud 21 and `links 22 and23 to the stud 26, which in turn raises the rod28. Any sticking on thepart of the ,said rod Vwill l result 4inexpansion of ,the springl to release the rod 28 from-stud 21 and preventbreakage. The invention is shown in connection with a multicolor shuttlechanging loom which,V employs cams 35 and 36, respectively, to coactwithlevers 37 and 38,' respectively, through the media of which the`selected 'shuttle .is advanced to changing position. f ,A Y

The matter thus-far Vdescribed of itself formsno part ofour presentinvention. i y

In carrying our invention into effect, we mounten the forward end ofVlever 16 adog or latch 40 normally held in the position `9 shown inFig. V3 by a' compression spring 4,1 interposed .between said dogV andthe lever 16.` The lower end of the latchis attached by meansof a link42 to the core 43 of a Solenoid 44( y Thelatter may be fed `cnrrentby1.190

means of wires 45 and 46, respectively, which are placed in circuit witha source of electric power when a change of shuttles is desired.Theupper endof the dog has a head 47 provided with an inclined vface '48which 'eX- tends' upwardly and terminates'in a; point 49. A finger 50projectsupwardly'from the latch and assists in the-locking operations tobeY described.

. The lever'20 isiprovided with lai'notjchfl defined by an overhang'52.As shown in indicatingposition.

" Inoperation, the parts will be in thejrelativefposition shown in Fig.3 so long fas suliic cient weft'in the running shuttle `ispresent forcontinuedweaving, the vcam` actinglto Araisefthe, dog every second pick,of vthe tloom without engaging` the lever 2,0. When an indication 'ofweft exhaustion is given by the detector,however, the solenoid 44`wil1be energized toattract its core 43- and thereby rock the dog or latch40about its Apivot 60 carried byfthelever 16.f When'the latchrocks,jtheloffset part 570i? the `finger 5() will.

` move up vthe Ainclinedv face 58 to depress the spring, and thereafterpermit the latter to snap upwardly into" the 'locking position shown inFig.'4. In this position the finger is held by the hook andthe pointedend .49 islbeneath the notchl. Shouldthe contact in the detectorbebrokendue to loom-vibration, the current flowing'through `the solenoid willVbe interrupted, but this Vwill Vnot a'ectthe position-of the latchbecausethe latter is held bythe spring hook orlock'.

When lthe .transfer `movement actually startsthe cam will give lever`4l'a'rapid upward movement the effect of Vwhich will be.` to Causethepoint l49fto enter Athe'notch 5 1 and` thereby operatively connect the.Vlevers 16 and 20. Continued upward movement of the lever 16 will raise.the boX rod 27,8 bythe connections previously described to eilectexchangeof shuttlesby means ofrrising boxes not lshown jbut similar. tothose set forth iny PatentNo. 1,7 53,233. Further yoperation of theloomwill turn ,the cam to effect downward movement of the lever 16, but thedownward movement: need not be. as fast" as the upward movement. L,

The manner ofmaintaining and releasing the lock lwill be described inconnection with Figs. 3, 4 and 6. When the dog or latch 40 moves 'fromthe position in Fig. 3 to that shown in Fig. 4 in response toenergization of the solenoid 44, the point 49 will be spaced slightly'from wall 65'which deiines the vertical part of the notch 51, but saidlatch will vmove far enough toY interconnect the linger 50 and thespring 5.4. The spring 41 is thus hel'dstres'sedr and acts with aconstant tend- Vency to'return the dog` to normalposition.

During the quick upward movement of lever AY16. the inclined face 48will engage inclined face 66 of the notch, the effectY of which willbeto movethe'fparts to the position shown in Fig. 6. This movement ofthe inclined so that the same will be spaced slightly, and also the bentend 57 of the vlinger `will extend. above the hook 56.

Further upwardmovement of lever 16 willv couple *thev same with lever20, and the levers surfaces `will disengage the finger and hook willmovethe rod 28 to the desired position,

after which they'willv begin their descent. When the stop. nut" 29 onthe rod 28 engages lthe rocker iron further downward Vmovement oflever2() and hook 56 will be prevented. Lever 16 moves rather slowly'atthis time, however, so that as it continues to descend, spring 41 has anopportunity Vto swing'the latch .and dog in clockwise direction to movelthe end 57 kover the hook. This disengagement of the locking feature isac- Y companied by a sliding of inclined facej48 along face .66. `It isto be understood that these operations take place when the exhaustedshuttle' isin such aposition that it cannot maintain a circuit throughthe solenoid, so thatkthe latter ldoes not oppose the action of spring'41.

From the' foregoing it will be seen that we have provided a. simplemeans for retainingY a setting of the actuator dog which may be set by amomentarily closed circuit, and that this circuit may be broken due tovibration ofthe loom or any other cause as soon as the.

latch has moved `Vto the locking position shown in Fig. 4 without lossof the indica.- tion. It will also be seen that` the etect of theinclined faces 48 `and 66 is to cause'a slight relative movement of thelocking finger andv hook at the beginning of the upward movement of thelever 20 to insure separation ofY these parts thus rendering impossiblethe raising'of Vthe hook by the lringer. It will further be seen thatVthe locking members act in such away as to unlock themselves Aon thedownward movement of the levers, this unlocking being lbrought aboutbyhaving the actuator lever move rather slowly as it descends but movableVfast enough as it ascends not to lose the locking effect. le findthatithe arrangement of the latch in transmitting a vertical force isbetter than the previously used latch which` slides in-,a horizontalplane.

Having thus described our invention it will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope oi the invention and We do not Wishto be limited to the details herein disclosed, but what we claim is:

l. In a shuttle changing loom, an actuator to have a working stroke, anormally inoperative member eective when moved to assist in the shuttlechanging operation, means movable at Weit exhaustion and prior to aworking stroke of the actuator to shuttle changing position tooperatively connect the actuator and member when the actuator has aworking stroke, and a lock to hold the means in shuttle changingposition-after being moved to said position and until the actuator' hasits Working stroke.

2. In a shuttle changing loom, an actuator to have a working stroke, anormally inoperative member eiiective when moved to assist in theshuttle changing operation, means movable at weft exhaustion and priorto a working stroke of the actuator to shuttle changing position tooperatively connect the actuator and member when the actuator has aworking stroke, and aV lock to hold the means in shuttle changingposition after being moved to said position and until the actuator hasits working stroke, the actuator eiiective on its Working stroke to movethe lock to unlocking position.

3. In a shuttle changing loom, an actuator to have a working stroke, a,normally inoperative member effective When moved to assist in theshuttle changing operation, means movable at weft exhaustion and priorto a working stroke of the actuator to shuttle changing position tooperatively connect the actuator and member when the actuator has aworking stroke, and a lock to hold the means in shuttle changingposition after being moved to said position and until the actuator hasits working stroke, said lock formed of two parts one of which iscarried by the member, and relativel movement of the actuator and membereffective to move the parts to unlocking position.

4f. In a shuttle changing loom, an actuator to have a working stroke, anormally inoperative member effective when moved to assist in theshuttle changing operation, means movable at Weit exhaustion and priorto a working stroke of the actuator to shuttle changing position tooperatively connect the actuator and member when the actuator has aWorking stroke, and a lock to hold the means in shuttle changingposition after being moved to said position and until the actuator hasits working stroke, said lock formed of two coacting parts, one carriedby the means and the other by the member, relative movement of theactuator and member effective to move the parts to unlocking position.

r 5. In a shuttle-changing loom, an actuator to have a working stroke,la normally inoperativemember effective when movedlto assist in theshuttle'changing operation, an electromagneticdevicelto be actuatedfatweft eX- haustion, a latch responsive to the device and movable therebyprior to a working stroke of the actuator tol shuttle changing positionWhere itwill be eii'ective to interconnect 'the member andactuatorffwhen theV latter hasta ,working stroke, and a' lockA to retainthe latch in shuttle; changing position independently oi the Aelectro-magnetic device, the `lock `rendered effective by the device. J1 1 .l 6. In a shuttle changing loom, an actuator,

having a working stroke'andanon-working stroke, a normally inoperativemember effec- Vtive when movedr to 'assist in the :shuttle changingoperation,` a latch capableofconnecting the actuator and member -tocause them to move together, yielding means nor-v mally holding thelatch out of shuttle changing position, a device operative at indicationof weft exhaustion to move the latch against tion, but movable atindication of weft eX- i haustion to shuttle changing position andcapable when in said position to interconnect the member and actuatorwhen the latter has a working stroke, and a lock to hold the latch inshuttle changing position, said lock including a part moved by the latchand a part moving with the member, the parts to be disengaged on theworking stroke of the actuator, but Vthe fast motion of the latterpreventing the latch from moving away from shuttle changing positionbefore the latch engages the member, and the latch disengaging itselffrom the member during the subsequent slow non-working stroke of theactuator.

8. In a shuttle changing loom, an lactuator l tuator, yielding meansnormally holding the l latch out of shuttle changing position, meansresponsive to an indication of weft exhaustion to move the latch intoshuttle changing position Where it is effective to connect the memberand the actuator when the latter has a Working stroke, and a lockcomprising two parts one of which is meved by the latch and y, GO

theother of which is supported Yby the meinbenaid llock .to hold the,latch in Shuttle y' changingposition and movable to unlocking positionbyafwerking stroke of the actuator, the latch on the'workinglstroke'due tothe fast movement. of the actuatorengaging the memi bern: after the lockis' unlocked before the :yielding means moves the latch away `fromshuttlechanging position,rsaid latch on the subsequent slow non-workingstroke ofthe actuator :being movable by thev yielding meansaway fromshuttle changing position before Vsaid iparts vare -ableto interact andf again lock the latch in 'shuttle changingposition. Y i Y In testimonywhereof we have hereunto affixed our signatures.`

v RICHARD GRRENLEAF TURNER. y

YVICTOR; H. JENNINGrS.V

